ssh - authorized_keys (password-less login)

Gotta make sure the permissions are the following

[amitava@collab ~]$ ls -ld .ssh
drwxr-xr-x 2 amitava amitava 4096 Nov 9 12:27 .ssh

[amitava@collab ~]$ ls -l .ssh
total 8
-rwx------ 1 amitava amitava 611 Nov 9 12:26 authorized_keys